Almost all freight from Mexico to the US and vice versa gets offloaded at a warehouse on the border and then switched to a different driver/mode of transportation as having a driver eligible to do the whole trip is hard to come by and expensive.
That being said, the rail ramp in Laredo, TX (the crossing point of Nuevo Leon, MX and the US) is active and widely used. Issue is that rail is slow so if your shipment has any urgency, you just use a truck. I use both and while US rail companies suck to work with, they can be very effective cost wise and help keep our total carbon emissions down. But nothing beats a truck in terms of speed and availability in the US...
You don't need to be able to know the words to understand the emotions. It's asking why watch any movies in the original language.
When I went to go see Star Wars Episode 3 when I was overseas, the English version with subtitles was packed while the local language dubbed version had a moderate crowd. People want to see the original because the delivery is usually just better, even if they can't understand the words.